{"success":true,"data":{"ext":"jng","name":"JNG","description":"JPEG Network Graphics (JNG) is an image file format developed by the Portable Network Graphics (PNG) and Multiple-image Network Graphics (MNG) working group as a companion to MNG. It was designed for storing JPEG-compressed image data within the MNG framework and was used in specialized web graphics and animation workflows. JNG saw limited adoption and is now considered a legacy format; modern software support is uncommon, so files from untrusted sources should still be handled cautiously.","mime":["video/x-jng"],"risk_level":"Safe","signatures":[{"hex":"8B 4A 4E 47","offset":0,"sources":[{"name":"Apache Tika","url":"https://raw.githubusercontent.com/apache/tika/main/tika-core/src/main/resources/org/apache/tika/mime/tika-mimetypes.xml"}]}],"related":[],"usage":{"python":"def is_jng(file_path: str) -> bool:\n    \"\"\"Check if file is a valid JNG by magic bytes.\"\"\"\n    signature = bytes([0x8B, 0x4A, 0x4E, 0x47])\n    with open(file_path, \"rb\") as f:\n        return f.read(4) == signature","node":"function isJNG(buffer: Buffer): boolean {\n  const signature = Buffer.from([0x8B, 0x4A, 0x4E, 0x47]);\n  return buffer.subarray(0, 4).equals(signature);\n}","go":"func IsJNG(data []byte) bool {\n    signature := []byte{0x8B, 0x4A, 0x4E, 0x47}\n    if len(data) < 4 {\n        return false\n    }\n    return bytes.Equal(data[:4], signature)\n}"},"category":"Video"}}